unity字节转贴图贴图旋转

您可以使用以下代码将字节数据转换为纹理，并在Unity中旋转它：

public Texture2D BytesToTexture(byte[] bytes, int width, int height)
{
    Texture2D texture = new Texture2D(width, height);
    texture.LoadImage(bytes);
    return texture;
}

public Texture2D RotateTexture(Texture2D originalTexture, float angle)
{
    int width = originalTexture.width;
    int height = originalTexture.height;

    RenderTexture renderTexture = RenderTexture.GetTemporary(width, height, 0, RenderTextureFormat.Default, RenderTextureReadWrite.Linear);
    Graphics.Blit(originalTexture, renderTexture);

    RenderTexture.active = renderTexture;

    Texture2D rotatedTexture = new Texture2D(width, height);
    rotatedTexture.ReadPixels(new Rect(0, 0, width, height), 0, 0);
    rotatedTexture.Apply();

    RenderTexture.active = null;
    RenderTexture.ReleaseTemporary(renderTexture);

    return rotatedTexture.Rotate(angle);
}

public Texture2D Rotate(this Texture2D originalTexture, float angle)
{
    Texture2D rotatedTexture = new Texture2D(originalTexture.width, originalTexture.height);
    int x, y;
    float x1, y1;
    float[,] values = new float[originalTexture.width, originalTexture.height];
    float radianAngle = angle * Mathf.Deg2Rad;
    float sin = Mathf.Sin(radianAngle);
    float cos = Mathf.Cos(radianAngle);

    for (y = 0; y < originalTexture.height; y++)
    {
        for (x = 0; x < originalTexture.width; x++)
        {
            x1 = ((x - originalTexture.width / 2) * cos) - ((y - originalTexture.height / 2) * sin) + originalTexture.width / 2;
            y1 = ((x - originalTexture.width / 2) * sin) + ((y - originalTexture.height / 2) * cos) + originalTexture.height / 2;

            if (x1 > 0 && x1 < originalTexture.width && y1 > 0 && y1 < originalTexture.height)
            {
                values[x, y] = originalTexture.GetPixelBilinear(x1 / originalTexture.width, y1 / originalTexture.height).grayscale;
            }
        }
    }

    for (y = 0; y < originalTexture.height; y++)
    {
        for (x = 0; x < originalTexture.width; x++)
        {
            rotatedTexture.SetPixel(x, y, new Color(values[x, y], values[x, y], values[x, y], 1));
        }
    }

    rotatedTexture.Apply();

    return rotatedTexture;
}

使用示例：

byte[] bytes = File.ReadAllBytes("path/to/texture.png");
Texture2D texture = BytesToTexture(bytes, 512, 512);
Texture2D rotatedTexture = RotateTexture(texture, 90f);

此示例将读取512x512像素的PNG文件，并将其旋转90度。